react-native/ReactCommon/cxxreact/oss-compat-util.h

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// Copyright 2004-present Facebook. All Rights Reserved.
//TODO #14683310 remove this header as soon as RN iOS OSS links against folly
#pragma once
#if defined(ANDROID)
#define USE_FOLLY_FOR_ENDIAN_SWAP 1
#define USE_FOLLY_FOR_TO_STRING 1
#elif defined(__has_include)
#define USE_FOLLY_FOR_ENDIAN_SWAP __has_include(<folly/Bits.h>)
#define USE_FOLLY_FOR_TO_STRING __has_include(<folly/Conv.h>)
#else
#define USE_FOLLY_FOR_ENDIAN_SWAP 0
#define USE_FOLLY_FOR_TO_STRING 0
#endif
#if USE_FOLLY_FOR_ENDIAN_SWAP
#include <folly/Bits.h>
#elif defined(__APPLE__)
#include <cstdint>
#include <CoreFoundation/CFByteOrder.h>
#endif // USE_FOLLY_FOR_ENDIAN_SWAP
#if USE_FOLLY_FOR_TO_STRING
#include <folly/Conv.h>
#else
#include <sstream>
#include <string>
#endif // USE_FOLLY_FOR_TO_STRING
#if USE_FOLLY_FOR_ENDIAN_SWAP
namespace facebook {
namespace react {
template <typename T>
inline T littleEndianToHost(T x) {
return folly::Endian::little(x);
}
#elif defined(__APPLE__)
namespace facebook {
namespace react {
// Yes, this is horrible. #14683310
inline int32_t littleEndianToHost(int32_t x) {
return CFSwapInt32LittleToHost(x);
}
inline uint32_t littleEndianToHost(uint32_t x) {
return CFSwapInt32LittleToHost(x);
}
inline int64_t littleEndianToHost(int64_t x) {
return CFSwapInt64LittleToHost(x);
}
inline uint64_t littleEndianToHost(uint64_t x) {
return CFSwapInt64LittleToHost(x);
}
#endif // USE_FOLLY_FOR_ENDIAN_SWAP
#if USE_FOLLY_FOR_TO_STRING
template <typename ...Ts>
inline std::string toString(Ts... values) {
return folly::to<std::string>(std::forward<Ts>(values)...);
}
#else
namespace {
template <typename ...Ts>
std::string toString(const std::stringstream& buf) {
return buf.str();
}
template <typename T, typename ...Ts>
std::string toString(std::stringstream& buf, T value, Ts... values) {
buf << value;
return toString(buf, std::forward<Ts>(values)...);
}
} // anonymous namespace
template <typename ...Ts>
std::string toString(Ts... values) {
std::stringstream buf{};
return toString(buf, std::forward<Ts>(values)...);
}
#endif // USE_FOLLY_FOR_TO_STRING
} // namespace react
} // namespace facebook
#undef USE_FOLLY_FOR_ENDIAN_SWAP
#undef USE_FOLLY_FOR_TO_STRING